"We've got wireless networks, sustainability features and gardens, there's a specialist science facility, a commercial kitchen and a girls' tech studies centre as well as an extraordinary range of sporting facilities," he said.

Mr Weatherill said combining four schools allowed a broader choice of subjects for the students.

"It's one of the reasons that motivated parents and students to make the decision to bring these schools together," he said.

Australian Education Union vice-president, Anne Crawford said the College would be a great community asset.

"Certainly students are very advantaged when they have a broader range of subjects and they can do subjects that they are interested in and good at," she said.

About 900 students from years 8 to 12 spent part of their first day getting to know the 15-hectare site and its facilities.